“For hierarchy, according to the anthropologist Christopher Boehm. Boehm studied tribal cultures early in his career, but had also studied chimpanzees with Jane Goodall. He recognized the extraordinary similarities in the ways that humans and chimpanzees display dominance and submission. In his book Hierarchy in the Forest, Boehm concluded that human beings are innately hierarchical, but that at some point during the last million years our ancestors underwent a “political transition” that allowed them to live as egalitarians by banding together to rein in, punish, or kill any would-be alpha males who tried to dominate the group. Alpha male chimps are not truly leaders of their groups. They perform some public services, such as mediating conflicts.28 But most of the time, they are better described as bullies who take what they want. Yet even among chimpanzees, it sometimes happens that subordinates gang up to take down alphas, occasionally going as far as to kill them.29 Alpha male chimps must therefore know their limits and have enough political skill to cultivate a few allies and stave off rebellion.”